Incubator.



OLIVER P. PHILLIPS, OF AMO, INDIANA IN CUBATOR.

Specification of Letters Patent.

Patented Dee. 24, 1907.

Application filed October 24| 1906. Serial No. 340.372.

t lowing is a speciiication.

This invention relates to incubators of the `type embodying a thermostat for automatically governing the temperature within the incubating chamber, being especiall di rected to an alarm connected w1th an com trolled bythe thermostatic mechanism.

The invention has for its objects to provide a comparatively simple, inexpensive device of this character wherein the temperature of the incubator will be properly governed and one wherein an alarm will be sounded for notifying the attendant in the event of the chamber becoming insufficiently or over heated. i'

Vith these and other objects in view, the invention comprises the novel features of construction and combination of parts more fully hereinafter described.

In the aecompan ing drawings: Figure 1 is avertical sectiona view taken centrally and longitudinally through an incubator equipped with an alarm mechanism embodying vthe invention. Fig. 2 is a detail pers ective view on anenlarged scale of aportion o the thermostatic -meehanism which controls the alarm. v

Referring to the drawings, 1 designates an incubator provided with su porting legs 2 and having an internal incu ating chamber 3 adapted for communication through the medium of an inlet pipe 4 with a tubular heating drum 5, beneath which there is arranged a lamp 6, sustained on a suitable supporting bracket 7 and having its chimney 8 extended upward into the drum over the upper open end of which latter there is disposed a movable cut-off plate or damper 9 suspended from the forward end of a regulating lever l0, fulcrumed, as at 11, to swing in a vertical plane and having on its rear end a counterbalancing weight 12.

The foregoing parts, except as hereinafter explained, may all be of the usualor any appropriate construction and Amaterial and are adapted in practice to perform their ordinary functions. q

Fixed on the to'p of the incubator casing-1 into shape to provide horizontal perforated attachi ears 14, for the reception of fastening mem ers to-secure the bearing in place,

and vertically-uprising bearing portions 15 while fixed on the lever 10 is a contact plate 16, -asrranged between the bearing ortions 15 and having up-turned longitudinaianges llperforated for the' reception of the intle 11, which in turn is terminally engage with the bearing portions 15, there being fixed on the plate 16 an outwardlv projecting contact arm18, extended from the plate at right. angles to the lever 10;"

Sustained in the chamber 3 by meansl of a bearing yoke 19 carried by hangers 20, is a thermostat 21, the rod 22 ofwhich projects upward through alining openings formed in thetop of the casing 1 and bearing plate 13, and is attached at its upper end to contact plate 16 at a point in advance of the fulcrum 11, it being understood that the thermostat, which is of the usual or any appropriate con struction, acts under the inliuence of the heat within the incubating chamber for movingthe forward end of lever 10 upward or downward to carry the cut-oli plate 9 toward or from the upper end of drum 5 and control the amount of heat delivered into the chamber 3, while the amount of power to be exerted by the thermostat for moving the lever may be controlled at will through the adjustment of -the weight 12 on the lever as usual in devices of this class.

Fixed on the top ofthe casing 1 at a point in advance of and suitably remote from the bearing 13, is a contact member or plate 23 composed of spring metal and having its outec end bifurcated and bent as shown to provide a pair of reversely extended spring contact portions or fingers 24, 25,.between which the arm 1.8 is, under normal conditions, centrally disposed, there being connected with y themembcr; 23, which is pivotally secured to the casing by a screw 25', one of the wires 26 of a normallyopen electric circuit including a battery 27 and an alarm, preferably in the form of a bell 28, the other wire 29 of the circuit being engaged beneath one of the ears 14 and in metallic connection with the contact plate 16 through one of the ears 15 and the pintle 1].

In preotiee, when the lmnp is lightedv the air entering'the drum 5 becomes heated as usnnl :uid passes through the inlet pipe 4 into the ehnmber 3 for heating the seme, the amount of heated air passing into the ehember beingr ol: course determined by the post tion of the ent-oil' l) relative'to the upper open end ol the drum. ln the event of the ehmnber beeoming` overheeted, the thermostat 2l will expand and reise. the lever 1U, thus enrrying the eut-oil S) upward end permitting :t eonsidereble percentage of the heated :tir toesenpe from the drum until the temperature within the elizunbeehes fallen lo the requisite degree, or should the temperature in the ehnmber full below the desired ei:il,e the lever l() for moving the eut-oil 9 downward tmvztrd the end of the drum, thus vrnnsiren :L greater quantity ol hearted zur to pnss into the elnunber. In the event of :in :ibnornml movement of the lever l0, under the netion of the thermostat :ind due to en extremely high or low tempernture within the ineubziting chamber, the :uni 18 will eonlnet with one or the other of the fingers 24, '25, thereby completing the eleetrie eireuit through` the Vwires 26, 2S) to sound the :ilfu'm 2S, whieh muy of eonrse be arranged :it :my desired point remote from the incubator. lt is to be noted flint tbe :um lh, whieh is disposed nezir the pivot ll, will move with the plate lll' in lhe :n'e of :i eirele l'or serzipiner eontnet with libe lingers 24, 25. thus insuringy positive eetion ol the. parts' :ind further that the eontnrt member 22% may, when rireulnsl :mees require.7 be turned on. the pivot l5 to :L position with the eontzn't lingers wholly out of the path of the arm. 18, thus throwing the alarm mechanism ont of action.

Having thus deseribed my invention, what I elimini is:

l. lne. device ol' the class described, e. easing provided with e ehnmber. inerme fer heeting the letter, means including e regulating lever lor governing the amount of heat supplied to the elnunber, it eontziet erm eonneeted for movement with the lever and disposed at right angles to the letter, zr Contact member pivoted on the resin; nud having n pair of spaced eonlnet portions enrved in e p ene parallel with the lever zuid between which said arm is arranged tor movement, said eonv teetmember being nnV 'n.ble to it position out ot' the pet/h of movement of the erm, e normally open eirruit inelnding the eonteet member and arm, und :rn alarm contained in seid eireuit.

2. .ln :t deviee of the (dass described, the combination of ai heated chamber, a thermostat therein having :t reeiproenting member, e swingingl plete actuated by the member, e. means carried on the? swinging plete for regulating the beet supplied to the chamber, a eontztet on the en inging plete disposed perellel with th) exis on whieh the letter nieves, n stetiom'uy eonl :iet provided with oppositely eurved extremities` between whieh the swinging eontltrt is disposed, and e. signal eireuit eontrolled bj the contacts.

ln lesliinonv whereof l :illix my Signature in presenee ol' two witnesses.

(lilYlCb P. PllIlil'iIPS.

Witnesses:

W. ll. Wn rrn. 

